TY  - JOUR
AU  - Odenwald, Philipp
AU  - Ma, Qianli
AU  - Davaasuren, Bambar
AU  - Dashjav, Enkhtsetseg
AU  - Tietz, Frank
AU  - Wolff, Michael
AU  - Rheinheimer, Wolfgang
AU  - Uhlenbruck, Sven
AU  - Guillon, Olivier
AU  - Fattakhova-Rohlfing, Dina
TI  - The Impact of Lithium Tungstate on the Densification and Conductivity of Phosphate Lithium Ion Conductors
JO  - ChemElectroChem
VL  - 9
IS  - 5
SN  - 2196-0216
CY  - Weinheim
PB  - Wiley-VCH
M1  - FZJ-2021-04351
SP  - e202101366
PY  - 2022
AB  - Phosphate lithium ion conductors are outstanding electrolyte materials for solid-state lithium batteries. As polycrystalline ceramics, they have to be sintered at high temperatures. Lithium tungstate Li 2 WO 4 (LWO) is reported for the first time as an effective sintering aid to reduce the sintering temperature for one of the most common solid-state lithium ion conductors, Li 1.5 Al 0.5 Ti 1.5 (PO 4 ) 3 (LATP). While densification of LATP without sintering aids requires temperatures of at least 950°C to obtain a relative density of 90%, here relative densities of 90-95% are achieved even at 775°C when 5 wt.% of LWO is added. At 800°C the LATP containing 5 - 7 wt.% LWO densifies to a relative density of 97.2%. The ionic conductivity of LWO containing LATP is generally higher than that of pure LATP sintered at the same temperature. LATP containing 7 wt.% LWO shows high ionic conductivity of 4.4 × 10 -4 S/cm after sintering at 825°C. A significant reduction in sintering temperature, an increase in density and in the ionic conductivity of LATP as well as its non toxicity render LWO a very promising sintering aid for the development of LATP-based solid state batteries.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000733391400001
DO  - DOI:10.1002/celc.202101366
UR  - https://juser.fz-juelich.de/record/902550
ER  -